A certain object in space is accelerating.From this,we know for certain that
A) its speed is changing.
B) both its speed and its direction of travel are changing.
C) its speed or its direction of travel is changing,but not both.
D) its speed,its direction of travel,or both are changing.

Question

Quizplus · Accepted Answer

Acceleration means a change in velocity which includes both speed and direction. Therefore, the object's speed, direction of travel, or both must be changing.

A Certain Object in Space Is Accelerating